Vladimir Oltean dc7ffe02ad net: mscc: ocelot: treat 802.1ad tagged traffic as 802.1Q-untagged ... [ Upstream commit 36dd1141be ] I was revisiting the topic of 802.1ad treatment in the Ocelot switch [0] and realized that not only is its basic VLAN classification pipeline improper for offloading vlan_protocol 802.1ad bridges, but also improper for offloading regular 802.1Q bridges already. Namely, 802.1ad-tagged traffic should be treated as VLAN-untagged by bridged ports, but this switch treats it as if it was 802.1Q-tagged with the same VID as in the 802.1ad header. This is markedly different to what the Linux bridge expects; see the "other_tpid()" function in tools/testing/selftests/net/forwarding/bridge_vlan_aware.sh. An idea came to me that the VCAP IS1 TCAM is more powerful than I'm giving it credit for, and that it actually overwrites the classified VID before the VLAN Table lookup takes place. In other words, it can be used even to save a packet from being dropped on ingress due to VLAN membership. Add a sophisticated TCAM rule hardcoded into the driver to force the switch to behave like a Linux bridge with vlan_filtering 1 vlan_protocol 802.1Q. Regarding the lifetime of the filter: eventually the bridge will disappear, and vlan_filtering on the port will be restored to 0 for standalone mode. Then the filter will be deleted. [0]: https://lore.kernel.org/netdev/20201009122947.nvhye4hvcha3tljh@skbuf/ Fixes: 7142529f16 ("net: mscc: ocelot: add VLAN filtering") Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net> Stable-dep-of: 5ec6d7d737 ("net: mscc: ocelot: delete PVID VLAN when readding it as non-PVID") Signed-off-by: Sasha Levin <sashal@kernel.org>		2025-05-09 09:43:58 +02:00
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amlogic
arc
at91	ARM: at91: Remove unused extern declarations	2023-07-29 16:56:09 +03:00
bcm2835
canaan
fsl
imx	clk: imx25: print silicon revision during init	2023-08-14 12:41:05 +03:00
mediatek	iommu/mediatek: Add enable IOMMU SMC command for INFRA masters	2023-08-07 14:15:48 +02:00
microchip
mscc	net: mscc: ocelot: treat 802.1ad tagged traffic as 802.1Q-untagged	2025-05-09 09:43:58 +02:00
qcom	soc: qcom: ice: introduce devm_of_qcom_ice_get	2025-05-02 07:50:37 +02:00
rockchip
sa1100
sifive
starfive
tegra	firmware: tegra: Add suspend hook and reset BPMP IPC early on resume	2023-11-20 11:59:16 +01:00